ResidentialHot water
Tankless Water Heater Installation
A tankless heater warms water as you use it. It can save space and stop the hot water from running out, but it is not the right fit for every Markham house.
Close-up of assorted hand tools on a wooden surface, perfect for DIY projects.
- Tank, burner, anode and relief valve checked in order
- Venting and drain pan looked at, not just the thermostat
- Repair-or-replace laid out with the reasons
- Hot water tested at the tap before we leave
- Licensing details confirmed when you call
- Residential
- Commercial
- Markham & York Region
How the job runs
- Your household regularly runs out of hot water.
- You want to free up floor space in a finished basement.
- The old tank is already living on borrowed time.
- Your gas meter and supply line have spare capacity.
What's included on this job
What we open
The old tank connections, the gas line run, and a wall for the new unit with room for venting.
What we bring
Press or solder kit, gas pipe threading tools, a combustion analyser, and isolation valve kits.
What we replace
Gas piping upsized if the meter run is too small, PVC venting, isolation valves and a condensate drain.
How we prove it
Every tap run hot at once to check the unit keeps up, and gas joints checked under full fire.
Signs you need this
- A tank that runs out during back-to-back showers
- A rental tank coming due
- Space needed in the mechanical room
- Planning a basement suite with its own taps
What Markham homes need to consider
Lake water reaching Markham in January arrives cold, which means a tankless unit has to raise the temperature a long way. A unit sized for a warm climate will struggle here. We size for winter, not summer. Gas supply matters too: many tankless units need a larger gas line than a standard tank, and a long run from the meter can be the most involved part of the job.
Hard water and maintenance
The heat exchanger inside a tankless unit is narrow and scale can build up in it. Most manufacturers ask for a yearly descaling flush. Where water is on the harder side, a softener or scale filter helps protect the unit.
How the installation runs
- We measure your peak use: how many showers and taps might run at once.
- We check gas meter capacity and plan the gas line size.
- We plan the venting route, usually through a side wall with clearance from windows and doors.
- We mount the unit, add isolation valves for flushing, and connect gas, water, venting and power.
- We fire it up, set the temperature, and show you how to run the yearly flush.
| Point | Tank | Tankless |
|---|---|---|
| Supply on a busy morning | Runs out when the tank empties | Keeps going, within its litres per minute |
| Space | Floor footprint | Wall-mounted |
| Upkeep | Occasional flush | Yearly descale advised |
What changes the cost
Gas line upgrades, venting distance, electrical outlet needs and removal of an existing rental tank all affect the final price. We itemise those so you can compare fairly.
Tankless units need gas. Plenty of Markham gas meters and branch lines were laid out for one furnace plus a 40-gallon tank, not a burner that big.
Call before it gets worse
Planning a switch while your old tank still works gives you time to decide properly instead of in a hurry.